Fecundity and oviposition of Eucelatoria bryani, a gregarious parasitoid of Helicoverpa zea and Heliothis virescens

摘要: We examined longevity, fecundity, and oviposition strategies of Eucelatoria bryani Sabrosky (Diptera: Tachinidae), a gregarious endoparasitoid Helicoverpa zea (Boddie) Heliothis virescens (E) (Lepidoptera: Noctuidae). Longevity adult female E. was not related to body size. In contrast larger females had greater potential fecundity than smaller females, as determined by the number embryonated eggs present in common oviduct. However, parasitoid size did affect primary clutch (number deposited host). Because embryos located ovisac were those elsewhere oviduct, maximum may be physiologically limited fully mature has available at one time. adjusted response host size, for both H. virescens. This adjustment appears adaptive because overexploit hosts depositing more larvae could support. Adult emergence Although weight positively influenced progeny weight, increases with counterbalanced